v3.25.1
Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($)
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities:    
Net income (loss) $ 401,022 $ (698,004)
Adjustments to reconcile net income (loss) to net cash used in operating activities:    
Depreciation 317,228 323,405
Non-cash lease expense 58  
Gain on disposal of assets (329,520) (36,886)
Deferred income taxes 0 (176,830)
Changes in operating assets and liabilities:    
Accounts receivable, net (1,768,125) (1,187,835)
Contract assets 48,811 118,301
Inventories, net (551,890) 580,978
Other current assets (27,167) (78,333)
Accounts payable 264,386 599,625
Accrued wages and salaries 56,924 119,473
Other accrued liabilities (5,632) 183,149
Unearned revenue and customer deposits (196,594) (145,802)
Other long-term liability (220,049) 0
Net cash used in operating activities (2,010,548) (398,759)
Cash flows from investing activities:    
Capital expenditures (42,683) (93,085)
Proceeds from the sale of assets 677,905 96,350
Proceeds from short-term investments 247,276 1,133,641
Purchases of short-term investments 0 (737,477)
Net cash provided by investing activities 882,498 399,429
Cash flows from financing activities:    
Cash dividends paid (28,984) (96,613)
Net cash used in financing activities (28,984) (96,613)
Net decrease in cash and cash equivalents (1,157,034) (95,943)
Cash and cash equivalents at beginning of period 1,922,679 1,387,075
Cash and cash equivalents at end of period 765,645 1,291,132
Non-cash investing and financing activities:    
Operating lease right-of-use asset obtained in exchange for operating lease liabilities $ 435,149 $ 0